Rhododendron plant named ‘HOMLEB’

ABSTRACT

A new and distinct  Rhododendron  cultivar named ‘HOMLEB’ is disclosed, characterized by large pink flowers and a distinctly upright, narrow plant form. Plants bloom Spring, Summer and Fall. The new cultivar is a  Rhododendron , suitable for ornamental garden purposes.

Latin name of the genus and species: Rhododendron hybrid.

Variety denomination: ‘HOMLEB’.

BACKGROUND OF THE INVENTION

The new cultivar is a product of a planned breeding program by the inventor, Robert Edward Lee. The inventor's intention was to develop compact growing Rhododendron hybrid plants with re-blooming characteristics. This new variety, hereinafter referred to as ‘HOMLEB’, was discovered as a seedling, resulting from the crossing of Rhododendron ‘Watchet’, unpatented with the pollen parent Rhododendron ‘Conleb’ U.S. Plant Pat. No. 10,581. The cross was performed during 1996, and the new variety selected by the inventor during 2002 in Independence, La.

After identifying the new variety as a potentially interesting selection, the inventor first organized propagation of ‘HOMLEB’ by vegetative cuttings during Fall 2002 at a commercial nursery in Independence, La. The inventor continued confidential, controlled testing and propagation, assessing stability of the unique characteristics of this variety. Multiple generations have been reproduced and have shown that the unique features of this cultivar are stable and reproduced true to type.

SUMMARY OF THE INVENTION

The cultivar ‘HOMLEB’ has not been observed under all possible environmental conditions. The phenotype may vary somewhat with variations in environment such as temperature, day length, and light intensity, without, however, any variance in genotype. The following traits have been repeatedly observed and are determined to be the unique characteristics of ‘HOMLEB’ These characteristics in combination distinguish ‘HOMLEB’ as a new and distinct Rhododendron cultivar:

-   -   1. Unique spring, summer, and fall blooming.     -   2. Pink flowers.     -   3. Easily propagated with semi-hardwood cuttings in late spring         through the summer.     -   4. Good specimen plant.     -   5. Excellent performance in containers     -   6. Very upright plant habit.     -   7. Vigorous growth under normal fertilization and moisture         conditions.     -   8. Hardy to Zone 7.     -   9. Attracts butterflies.     -   10. Narrow plant shape.     -   11. Large, single flowers.

COMPARISON TO PARENT VARIETY

‘HOMLEB’ is similar in most horticultural characteristics to the seed parent variety Rhododendron hybrid ‘Watchet’. Plants of the new cultivar ‘HOMLEB’ however, produce bright pink flowers. Additionally, plant habit is overall less compact in the new variety, compared to the seed parent.

‘HOMLEB’ is similar in most horticultural characteristics to the pollen parent variety Rhododendron hybrid ‘Conleb’. Plants of the new cultivar ‘HOMLEB’ however, produce pink flowers, whereas ‘Conleb’ produces deep orange red flowers. Additionally, plant habit of ‘HOMLEB’ is narrow and upright whereas the pollen parent has a plant shape which is more globose.

COMMERCIAL COMPARISON

‘HOMLEB’ can be compared to the commercial variety Rhododendron hybrid ‘Roblel ’ U.S. Plant Pat. No. 16,278. Plants of the new cultivar ‘HOMLEB’ are similar to plants of ‘Roblel’ in most horticultural characteristics, however, plants of the new cultivar ‘HOMLEB’ produce smaller flowers of a different shade of pink. Additionally plants of ‘HOMLEB’ are more upright and smaller than plants of ‘Roblel’.

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

The accompanying photograph in FIG. 1 illustrates in full color a typical plant of ‘HOMLEB’ grown outdoors in Alabama. The plant is approximately 2 years old, and is shown in a three gallon container.

FIG. 2 shows a close up of typical flowers of the new variety.

The photographs were taken using conventional techniques and although colors may appear different from actual colors due to light reflectance it is as accurate as possible by conventional photographic techniques.

DETAILED BOTANICAL DESCRIPTION

In the following description, color references are made to The Royal Horticultural Society Colour Chart 2007 except where general terms of ordinary dictionary significance are used. The following observations and measurements describe ‘HOMLEB’ plants grown outdoors in Loxley, Ala. Plants are approximately 2 years old, in a 3 gallon nursery container. Measurements and numerical values represent averages of typical plant types.

-   Botanical classification: Rhododendron hybrid ‘HOMLEB’.

PROPAGATION

-   Typically by semi-hardwood cuttings in Spring and Summer. -   Root description: Fine, fibrous young roots, well branched. Colored     near RHS Grey-Brown 199A.

PLANT

-   Growth habit: Upright shrub. -   Height: Approximately 54 cm to top of foliar and flowering plane. -   Plant spread: Approximately 35 cm. -   Branching characteristics: Well branched, approximately 8 to 12     primary branches from the center of the plant. Branches occur at     approximately 15° angles. Each primary branch has 4 to 6 lateral     branches. -   Primary branches:     -   -   Length of primary branches.—Average 45 cm.         -   Diameter of primary branches.—Approximately 0.45 cm.         -   Primary branch strength.—Very strong, difficult to break.         -   Primary branch color.—Young Branches Near RHS Yellow-Green             151A, with age, covered with a thin bark like layer colored             near Greyed-Orange 164A.         -   Primary branch texture.—Young growth hirsute, hairs,             approximately 0.15 cm long, colored near Greyed-Orange 164B.             Older growth scaly, hirsute. Hairs colored near White 155D. -   Lateral branches:     -   -   Number of lateral branches.—Approximately 4 to 6 per primary             branch.         -   Length of lateral branches.—Average 12 cm.         -   Diameter of lateral branches.—Average 0.4 cm.         -   Lateral branch strength.—Very strong, flexible.         -   Lateral branch color.—Near RHS Yellow-Green 144B.         -   Lateral branch texture.—Hirsute. -   Internode length: Average 0.5 cm to 2.0 cm. -   Age of plant described: Approximately 2 years.

FOLIAGE

-   Leaf:     -   -   Type.—Simple.         -   Arrangement.—Alternate.         -   Average length.—Approximately 5.4 cm.         -   Average Width.—Approximately 1.9 cm.         -   Shape of blade.—Oblanceolate.         -   Apex.—Mucronate.         -   Base.—Broad attenuate.         -   Attachment.—Stalked.         -   Margin.—Entire.         -   Texture of top surface.—Pubescent. Hairs appressed.         -   Texture of bottom surface.—Pubescent. More hairs present             along main vein and margin.         -   Color.—Young foliage upper side: Near RHS Green 137A. Young             foliage under side: Near RHS Green 137B. Mature foliage             upper side: Near RHS Green 137A, but darker. Mature foliage             under side: Near RHS Green 138A.         -   Venation.—Type: Pinnate. Venation color upper side: Near RHS             Yellow-Green N144B. Venation color under side: Near RHS             Yellow-Green N144A.         -   Petiole.—Length: About 1.1 cm. Diameter: About 0.3 cm.             Color: Upper Surface: Near RHS Yellow-Green N144C. Lower             Surface: Near RHS Yellow-Green N144C.

FLOWER

-   Bloom period: Plants flower in the Spring, then begin intermittent     flowering cycles in late Spring/Summer through Fall. -   Flower:     -   -   Arrangement.—Axillary clusters of perfect, open funnel             shaped individual flowers. Typically 6 to 10 flowers per             cluster. -   Inflorescence:     -   -   Height.—Average 12.0 cm.         -   Diameter.—Average 15.0 cm. -   Peduncle:     -   -   Length.—Average 1.8 cm.         -   Diameter.—0.3 cm.         -   Color.—Near RHS Yellow-Green N144A.         -   Texture.—Densely pubescent.         -   Aspect.—Straight to very slightly curved. Angle of             attachment, approximately 35° angle from stem. -   Flowers:     -   -   Length.—Average 4.1 cm.         -   Diameter.—Average 5.5 cm.         -   Facing direction.—Outwardly and upwardly facing.         -   Persistent or self-cleaning.—Petals self-cleaning.         -   Fragrance.—None.         -   Tube.—Tube length: Approximately 1.4 cm. Tube width a widest             point: Approximately 1.3 cm. Tube width and narrowest point:             Approximately 0.8 cm.         -   Petals.—Unfused petal segments: Length: Approximately             2.3 cm. Width: Approximately 2.1 cm. Apex: Blunt, rounded             with shallow, irregular lobes. Shape of petal: Unfused             portion, obovate. Petal margin: Entire. Petal margin             undulating. Petal Arrangement: Approximately ⅓ fused from             base. Petal Number: 5. Petal Texture: Smooth. Color: Upper             surface at first opening: Near RHS Red 55A. Under surface at             first opening: Near RHS Red-Purple 61B. Inner surface at             maturity: Near RHS Red-Purple 62A, flushed near base             Red-Purple 64C. Outer surface at maturity: Near RHS             Red-Purple 65A, flushed near base Red-Purple 64B. Upper             surface at fading: Near RHS Red-Purple 65A, flushed near             base Red-Purple 64B. Under surface at fading: Near RHS             Red-Purple 65A, flushed near base Red-Purple 64B. -   Bud:     -   -   Shape.—Elliptic.         -   Length.—2.4 cm.         -   Diameter.—1.1 cm.         -   Color.—Near RHS Red-Purple 64C. -   Calyx/sepals:     -   -   Quantity per flower.—5 sepals.         -   Shape.—Narrow deltate.         -   Length.—0.7 cm.         -   Width.—0.3 cm.         -   Apex.—Acute.         -   Base.—Fused.         -   Margin.—Entire.         -   Texture.—Highly pubescent.         -   Color.—Inner Surface: Near RHS Green 137A. Outer Surface:             Near RHS Green 137A.

REPRODUCTIVE ORGANS

-   Stamens:     -   -   Number.—10.         -   Length.—2.9 cm.         -   Width.—0.1 cm.         -   Color.—Near RHS Red-Purple 63C.         -   Anthers.—Length: Approximately 0.3 cm. Color: Near RHS             Red-Purple 65A. Pollen: Scant, colored near Red-Purple 62D. -   Pistil:     -   -   Number.—1.         -   Length.—4.1 cm.         -   Style.—Length: 3.8 cm. Color: Near RHS Red-Purple 65C.         -   Stigma.—Globular, colored near Red-Purple 62B.         -   Ovary.—Sericeous texture. Approximately 0.3 cm in diameter.             Colored near Red-Purple 62C.

OTHER CHARACTERISTICS

-   Disease and pest resistance: Not observed to be susceptible nor     resistant to normal diseases and pests of Rhododendron hybrid. -   Temperature tolerance: USDA Zone 6. -   Fruit/seed production: Not observed to date. 

What is claimed is:
 1. A new and distinct cultivar of Rhododendron plant named ‘HOMLEB’ as herein illustrated and described. 